Hi Jade,
1 The individual's GP who could refer them to the local sleep clinic or elsewhere for support. For advice you could try these:
http://www.medicaladvisoryservice.org.uk/page10.htmlhttp://www.sleepcouncil.org.uk/index.cfm2 Training?
3 Mandatory and legislative would be training in First Aid, Manual Handling etc. You could carry out research on the internet, read books or articles in magazines, shadow a colleague or professional from another agency etc.
Hope that helps
Aunty Sue